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United States Department of Agriculture

Agricultural Research Service

Research Project: CHARACTERIZATION, PRODUCTION, AND UTILIZATION OF PHYTOCHEMICALS FROM AGRICULTURAL PRODUCTS

Location: Functional Foods Research Unit

Title: Extraction and Analysis of Tomato Seed Oil

Authors
item Eller, Fred
item Moser, Jill
item Kenar, James
item Taylor, Scott

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: May 19, 2010
Publication Date: May 19, 2010
Citation: Eller, F.J., Moser, J.K., Kenar, J.A., Taylor, S.L. 2010. Extraction and Analysis of Tomato Seed Oil. American Oil Chemists' Soceity Meeting.

Technical Abstract: Tomato seeds represent a very large waste by-product from the processing of tomatoes into products such as tomato juice, sauce and paste. One potential use for these seeds is as a source of vegetable oil. This research investigated the oil content of tomato seeds using several extraction techniques as well as an examination of the oil extracts to determine the composition of the minor constituents such as phytosterol and antioxidant composition. The oxygen radical absorbance capacity (ORAC) of the tomato seed oils were also measured and correlated with antioxidant contents. This research demonstrated that tomato seed oil yield was highest using hot ethanol and followed by hot hexane and finally SC-CO2. The SC-CO2 treatment, however, had the highest total phytosterol content as well as highest individual phytosterol content. Sitosterol, cycloartanol, and stigmasterol were the most abundant phytosterols present in the extracts. The highest concentrations of antioxidants were found in the hexane extract. The most abundant antioxidants found in the tomato seed oils were all-trans-lycopene, cis -3-lycopene and ß-carotene. ORAC was highest for the hexane extract. Oil yield was inversely proportional to both a-tocopherol and '-tocopherol content and positively correlated with cis-3-lycopene content. ORAC values were positively correlated with only all-trans-lycopene and cis-3-lycopene demonstrating their role as antioxidants in the tomato seed oil.

Last Modified: 9/1/2014
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